As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAS - CREW REPORTED LEFT ENGINE CONSTANT SPEED DRIVE TEMPERATURE ROSE INTO RED ZONE. EMERGENCY DECLARED FLIGHT RETURNED LAS LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED LEFT ENGINE CONSTANT SPEED DRIVE AND GENERATOR. SYSTEM GROUND CHECK NORMAL OPERATION.